Add tests for resource fungibility plugin

Author: carlory

go.mod

@@ -3,7 +3,9 @@ module github.com/inftyai/scheduler
 go 1.24.1
 
 require (
+	github.com/google/go-cmp v0.7.0
 	github.com/inftyai/llmaz v0.1.3
+	github.com/stretchr/testify v1.10.0
 	k8s.io/api v0.33.1
 	k8s.io/apimachinery v0.33.1
 	k8s.io/client-go v0.33.1
@@ -38,7 +40,6 @@ require (
 	github.com/google/btree v1.1.3 // indirect
 	github.com/google/cel-go v0.23.2 // indirect
 	github.com/google/gnostic-models v0.6.9 // indirect
-	github.com/google/go-cmp v0.7.0 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0 // indirect
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.24.0 // indirect
@@ -53,6 +54,7 @@ require (
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/opencontainers/go-digest v1.0.0 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/prometheus/client_golang v1.22.0 // indirect
 	github.com/prometheus/client_model v0.6.1 // indirect
 	github.com/prometheus/common v0.62.0 // indirect

pkg/plugins/resource_fungibility/resource_fungibility.go

@@ -53,10 +53,9 @@ var (
 	resource = "openmodels"
 )
 
-// TODO: get the inference service to extract the flavors.
 type ResourceFungibility struct {
 	handle    framework.Handle
-	dynClient *dynamic.DynamicClient
+	dynClient dynamic.Interface
 }
 
 type flavor struct {
@@ -172,6 +171,11 @@ func (rf *ResourceFungibility) calPreFilterState(ctx context.Context, pod *v1.Po
 		}
 	}
 
+	if len(serviceFlavors) == 0 {
+		s.shouldSkip = true
+		return nil
+	}
+
 	for _, f := range serviceFlavors {
 		if len(f.NodeSelector) == 0 {
 			// Once nodeSelector is empty, which means all nodes are potential candidates,